crypto: shash - Fix alignment in unaligned operations
When we encounter an unaligned pointer we are supposed to copy
it to a temporary aligned location. However the temporary buffer
isn't aligned properly. This patch fixes that.
Signed-off-by: Herbert Xu <[email protected]>
---
crypto/shash.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/crypto/shash.c b/crypto/shash.c
index e543283..171c8f0 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -76,8 +76,9 @@ static int shash_update_unaligned(struct shash_desc *desc, const u8 *data,
unsigned long alignmask = crypto_shash_alignmask(tfm);
unsigned int unaligned_len = alignmask + 1 -
((unsigned long)data & alignmask);
- u8 buf[shash_align_buffer_size(unaligned_len, alignmask)]
+ u8 ubuf[shash_align_buffer_size(unaligned_len, alignmask)]
__attribute__ ((aligned));
+ u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
int err;
if (unaligned_len > len)
@@ -111,8 +112,9 @@ static int shash_final_unaligned(struct shash_desc *desc, u8 *out)
unsigned long alignmask = crypto_shash_alignmask(tfm);
struct shash_alg *shash = crypto_shash_alg(tfm);
unsigned int ds = crypto_shash_digestsize(tfm);
- u8 buf[shash_align_buffer_size(ds, alignmask)]
+ u8 ubuf[shash_align_buffer_size(ds, alignmask)]
__attribute__ ((aligned));
+ u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1);
int err;
err = shash->final(desc, buf);